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geekman/subst-exec.sh

Created May 30, 2019 09:23
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replaces patterns like "<? cmd ?>" by executing cmd
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subst-exec.sh
#
# awk one-liner to replace patterns like "<? cmd ?>" by executing cmd
# handy for use in config files "templates"
#
cat <<EOF | awk '{ if (match($0, /<\?(.*)?>/)) { cmd = substr($0, RSTART+2, RLENGTH-2-2); system(cmd) } else print }'
my directory has these files:
<? ls / ?>
EOF
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